Mount Io
硫黄山
An active volcano and UNESCO World Heritage site in Shiretoko National Park known for its rare sulfur eruptions and alpine flora.
What it is
- An active volcano standing 1,562 meters tall on the Shiretoko Peninsula in Hokkaido.
- A UNESCO World Heritage site that began its volcanic activity approximately 240,000 years ago.
- A former industrial site where sulfur mining was conducted until World War II.
- A protected natural area spanning the towns of Rausu and Shari.
What to see
- Two volcanic craters located within the summit area of the mountain.
- Large amounts of molten sulfur frequently erupting from the first crater.
- Rare Shiretoko violets growing in the gravel fields near the summit.
- A low forest limit beginning between 500 and 800 meters above sea level.
Notes written by Japan Gems from facts in Japanese Wikipedia.
Where it is
Mount Io Open in Google Maps
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